IAA RAS IAA Minor Planet Database

12538 (1998 OH)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4059016556 ± 4.35e-09
Semi-major axis (a)1.5415724184 AU ± 7.25e-10
Inclination (i)24.53563599° ± 8.41e-07
Long. of Asc. Node (Ω)220.68792372° ± 1.75e-06
Arg. of Perihelion (ω)321.78911043° ± 1.84e-06
Mean Anomaly (M)163.00612547° ± 9.55e-07
Mean Motion (n)0.5149515611°/day ± 3.63e-10
Perihelion dist (q)0.91584562 AU ± 6.72e-09
Aphelion dist (Q)2.16729922 AU ± 6.78e-09
Orbital Period1.91401747 yr ± 1.35e-09
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.272″
Uncertainty0
Orbit TypeApollo
MOID0.029256 AU
Observations Used10512
Radar Obs Used1
Gaia Obs Used113
Oppositions14
Arc Total1987-2025
First Observation Used1987-08-22
Last Observation Used2025-12-01
Observations (19002)
Date Type RA Dec Mag Band Observatory
2020-12-24 10:44:08 S 06 59 19.258 -45 33 01.22 – V C57
2020-12-24 10:44:08 s 1 -49011.787 0 +401913.97 2000.0 – C57
2020-12-24 10:54:08 S 06 59 18.854 -45 33 25.81 – V C57
2020-12-24 10:54:08 s 1 -49348.454 0 +401859.60 8540.0 – C57
2020-12-24 11:04:08 S 06 59 18.432 -45 33 50.22 – V C57
2020-12-24 11:04:08 s 1 -49685.016 0 +401804.38 4880.0 – C57
2020-12-24 11:14:08 S 06 59 17.957 -45 34 16.28 – V C57
2020-12-24 11:14:08 s 1 -50021.473 0 +401748.28 1020.0 – C57
2020-12-24 11:24:08 S 06 59 17.633 -45 34 41.63 – V C57
2020-12-24 11:24:08 s 1 -50357.823 0 +401691.31 6960.0 – C57
2020-12-24 11:34:08 S 06 59 17.158 -45 35 06.32 – V C57
2020-12-24 11:34:08 s 1 -50694.066 0 +401633.48 2700.0 – C57
2020-12-24 11:44:08 S 06 59 16.634 -45 35 30.84 – V C57
2020-12-24 11:44:08 s 1 -51030.201 0 +401574.78 8240.0 – C57
2020-12-24 11:54:08 S 06 59 16.248 -45 35 55.54 – V C57
2020-12-24 11:54:08 s 1 -51366.228 0 +401515.22 3580.0 – C57
2020-12-24 12:04:08 S 06 59 15.881 -45 36 22.32 – V C57
2020-12-24 12:04:08 s 1 -51702.146 0 +401454.79 8720.0 – C57
2020-12-24 12:14:08 S 06 59 15.494 -45 36 46.48 – V C57
2020-12-24 12:14:08 s 1 -52037.953 0 +401393.49 3650.0 – C57
2020-12-24 12:24:08 S 06 59 15.014 -45 37 11.93 – V C57
2020-12-24 12:24:08 s 1 -52373.650 0 +401331.32 8380.0 – C57
2020-12-24 12:34:08 S 06 59 14.477 -45 37 37.13 – V C57
2020-12-24 12:34:08 s 1 -52709.235 0 +401268.28 2900.0 – C57
2020-12-24 12:44:08 S 06 59 14.146 -45 38 02.54 – V C57
2020-12-24 12:44:08 s 1 -53044.708 0 +401204.38 7220.0 – C57
2020-12-24 12:54:08 S 06 59 13.747 -45 38 26.30 – V C57
2020-12-24 12:54:08 s 1 -53380.067 0 +401139.61 1320.0 – C57
2020-12-24 13:04:08 S 06 59 13.334 -45 38 52.26 – V C57
2020-12-24 13:04:08 s 1 -53715.313 0 +401073.98 5220.0 – C57
2020-12-24 13:14:08 S 06 59 12.854 -45 39 18.86 – V C57
2020-12-24 13:14:08 s 1 -54050.444 0 +401007.47 8910.0 – C57
2020-12-24 13:24:08 S 06 59 12.446 -45 39 42.52 – V C57
2020-12-24 13:24:08 s 1 -54385.460 0 +400940.10 2380.0 – C57
2020-12-24 13:34:08 S 06 59 12.103 -45 40 07.10 – V C57
2020-12-24 13:34:08 s 1 -54720.359 0 +400871.87 5650.0 – C57
2020-12-24 13:44:08 S 06 59 11.714 -45 40 31.48 – V C57
2020-12-24 13:44:08 s 1 -55055.142 0 +400802.76 8700.0 – C57
2020-12-24 13:54:08 S 06 59 11.098 -45 40 57.40 – V C57
2020-12-24 13:54:08 s 1 -55389.807 0 +400732.79 1530.0 – C57
2020-12-24 14:04:08 S 06 59 10.718 -45 41 22.06 – V C57
2020-12-24 14:04:08 s 1 -55724.353 0 +400661.95 4150.0 – C57
2020-12-24 14:14:08 S 06 59 10.262 -45 41 45.10 – V C57
2020-12-24 14:14:08 s 1 -56058.780 0 +400590.25 6560.0 – C57
2020-12-24 14:34:08 S 06 59 08.926 -45 42 38.38 – V C57
2020-12-24 14:34:08 s 1 -56727.274 0 +400444.23 710.0 – C57
2020-12-24 14:44:08 S 06 59 08.856 -45 43 03.65 – V C57
2020-12-24 14:44:08 s 1 -57061.339 0 +400369.93 2460.0 – C57
2020-12-24 14:54:08 S 06 59 08.609 -45 43 27.52 – V C57
2020-12-24 14:54:08 s 1 -57395.282 0 +400294.75 3990.0 – C57
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-14 21:19:00 24772.1678 4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)